When you purposely decide to take a full days worth of shit in your pants while wearing underwear. The more shit the better, also the longer you leave it, the more dedicated you are.
Hey bro! I got these girls numbers and they want to meet us at the bar tonight, you in?
Nah man, I woke up today with the full blown urge to have a fat mudding fest all day long. I ain't gonna ruin that.
An autoerotic or homoerotic activity in which butch gays and bis get their shoes, jeans and even whole selves muddy while pounding tar around town or skating. Mudding is the latest fetish to reveal itself online in a big way. Also called "muddin'."
Derk and Craig always went mudding around The Charles after skating through Cambridge, getting their baggy jeans and Airwalks all dirty and wet.